Title :
Iterative interference cancellation scheme with pilot-aided space-time estimation in DS-CDMA systems
Author :
Brunel, Loïc ; Mottier, David
Author_Institution :
Mitsubishi Electr. ITE, Rennes, France
fDate :
6/23/1905 12:00:00 AM
Abstract :
Iterative multiuser interference cancellation schemes for direct sequence code division multiple access systems exhibit good performance results for a reasonable complexity. We study an efficient iterative scheme, combining interference cancellation, soft input soft output decoding and beamforming. To deal with unknown channels, we add a pilot-aided space-time channel estimation in each iteration. The iterative structure has two advantages: the observation signal used for estimation contains less interference from one iteration to the following and soft estimates of coded bits are available for data-aided estimation.
Keywords :
code division multiple access; decoding; interference suppression; iterative methods; land mobile radio; multiuser channels; parameter estimation; radiofrequency interference; spread spectrum communication; DS-CDMA systems; SISO decoding; UMTS; beamforming; data-aided estimation; direct sequence code division multiple access systems; iterative interference cancellation; iterative structure; observation signal; pilot-aided space-time channel estimation; pilot-aided space-time estimation; soft input soft output decoding; third generation Universal Mobile Telecommunication System; 3G mobile communication; Array signal processing; Channel estimation; Convolutional codes; Direct-sequence code-division multiple access; Frequency conversion; Interference cancellation; Iterative decoding; Multiaccess communication; Signal processing;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956585
